Hourly Weather | Today Thursday, February 26, 2026
Stamford, Connecticut
4 AM
Night
34°
Feels Like 27°
16
Humidity: 84%
UV Index: 0
Wind: 8 mph
5 AM
Night
32°
Feels Like 25°
16
Frost Risk: 55%
Humidity: 84%
UV Index: 0
Wind: 8 mph
6 AM
Night
32°
Feels Like 25°
10
Humidity: 78%
UV Index: 0
Wind: 8 mph
7 AM
Cloudy Weather
30°
Feels Like 25°
0
Humidity: 80%
UV Index: 0
Wind: 7 mph
8 AM
Cloudy Weather
32°
Feels Like 28°
0
Humidity: 77%
UV Index: 1
Wind: 7 mph
9 AM
Cloudy Weather
36°
Feels Like 36°
0
Humidity: 68%
UV Index: 2
Wind: 7 mph
10 AM
Cloudy Weather
37°
Feels Like 39°
0
Humidity: 61%
UV Index: 3
Wind: 7 mph
11 AM
Cloudy Weather
39°
Feels Like 41°
0
Humidity: 57%
UV Index: 4
Wind: 7 mph
12 PM
Cloudy Weather
41°
Feels Like 43°
0
Humidity: 54%
UV Index: 3
Wind: 7 mph
1 PM
Cloudy Weather
41°
Feels Like 39°
0
Humidity: 54%
UV Index: 2
Wind: 7 mph
2 PM
Cloudy Weather
43°
Feels Like 43°
0
Humidity: 52%
UV Index: 1
Wind: 6 mph
3 PM
Cloudy Weather
41°
Feels Like 43°
0
Humidity: 57%
UV Index: 1
Wind: 5 mph
4 PM
Cloudy Weather
39°
Feels Like 43°
0
Humidity: 60%
UV Index: 0
Wind: 4 mph
5 PM
Cloudy Weather
39°
Feels Like 39°
0
Humidity: 63%
UV Index: 0
Wind: 4 mph
6 PM
Cloudy Weather
37°
Feels Like 39°
0
Humidity: 65%
UV Index: 0
Wind: 4 mph
7 PM
Cloudy Weather
37°
Feels Like 37°
0
Humidity: 70%
UV Index: 0
Wind: 4 mph
8 PM
Cloudy Night
36°
Feels Like 36°
0
Humidity: 73%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
34°
Feels Like 34°
0
Humidity: 75%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
34°
Feels Like 30°
0
Humidity: 75%
UV Index: 0
Wind: 5 mph
11 PM
Night
32°
Feels Like 28°
0
Humidity: 73%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 AM
39 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.26 µg/m³
  • PM10: 11.46 µg/m³
  • O3: 0.036 ppm
  • NO2: 6.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.21 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 AM
39 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.37 µg/m³
  • PM10: 11.48 µg/m³
  • O3: 0.036 ppm
  • NO2: 6.7 ppb
  • SO2: 1 ppb
  • CO: 0.21 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 AM
41 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.83 µg/m³
  • PM10: 11.86 µg/m³
  • O3: 0.036 ppm
  • NO2: 6.9 ppb
  • SO2: 1.2 ppb
  • CO: 0.21 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 AM
45 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.79 µg/m³
  • PM10: 12.91 µg/m³
  • O3: 0.036 ppm
  • NO2: 8 ppb
  • SO2: 1.5 ppb
  • CO: 0.22 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 AM
49 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.76 µg/m³
  • PM10: 14.1 µg/m³
  • O3: 0.036 ppm
  • NO2: 10.5 ppb
  • SO2: 1.7 ppb
  • CO: 0.23 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 AM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.42 µg/m³
  • PM10: 15.13 µg/m³
  • O3: 0.036 ppm
  • NO2: 12.1 ppb
  • SO2: 1.8 ppb
  • CO: 0.25 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 AM
53 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.19 µg/m³
  • PM10: 16.25 µg/m³
  • O3: 0.038 ppm
  • NO2: 11.4 ppb
  • SO2: 1.8 ppb
  • CO: 0.26 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 AM
56 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.62 µg/m³
  • PM10: 17.8 µg/m³
  • O3: 0.041 ppm
  • NO2: 10.8 ppb
  • SO2: 1.9 ppb
  • CO: 0.26 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

12 PM
63 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.02 µg/m³
  • PM10: 21.56 µg/m³
  • O3: 0.043 ppm
  • NO2: 11.3 ppb
  • SO2: 1.8 ppb
  • CO: 0.27 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

1 PM
72 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 22.32 µg/m³
  • PM10: 26.22 µg/m³
  • O3: 0.044 ppm
  • NO2: 12.2 ppb
  • SO2: 1.8 ppb
  • CO: 0.28 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

2 PM
80 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 26.08 µg/m³
  • PM10: 30.23 µg/m³
  • O3: 0.044 ppm
  • NO2: 15.2 ppb
  • SO2: 1.9 ppb
  • CO: 0.30 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
83 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 27.59 µg/m³
  • PM10: 31.72 µg/m³
  • O3: 0.043 ppm
  • NO2: 16.9 ppb
  • SO2: 1.9 ppb
  • CO: 0.31 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
83 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 27.52 µg/m³
  • PM10: 31.49 µg/m³
  • O3: 0.041 ppm
  • NO2: 18.6 ppb
  • SO2: 1.9 ppb
  • CO: 0.31 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
83 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 27.67 µg/m³
  • PM10: 31.67 µg/m³
  • O3: 0.037 ppm
  • NO2: 21.6 ppb
  • SO2: 1.6 ppb
  • CO: 0.32 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
87 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 29.53 µg/m³
  • PM10: 33.89 µg/m³
  • O3: 0.029 ppm
  • NO2: 27.1 ppb
  • SO2: 1.2 ppb
  • CO: 0.37 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 PM
95 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 32.89 µg/m³
  • PM10: 37.7 µg/m³
  • O3: 0.023 ppm
  • NO2: 31.7 ppb
  • SO2: 1.1 ppb
  • CO: 0.41 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

8 PM
104 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 36.94 µg/m³
  • PM10: 42.26 µg/m³
  • O3: 0.019 ppm
  • NO2: 35.1 ppb
  • SO2: 1.1 ppb
  • CO: 0.46 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

9 PM
117 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 42.17 µg/m³
  • PM10: 48.12 µg/m³
  • O3: 0.016 ppm
  • NO2: 37.9 ppb
  • SO2: 1.2 ppb
  • CO: 0.50 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

10 PM
134 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 49.1 µg/m³
  • PM10: 56.11 µg/m³
  • O3: 0.013 ppm
  • NO2: 41.7 ppb
  • SO2: 1.2 ppb
  • CO: 0.57 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

11 PM
150 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 55.34 µg/m³
  • PM10: 63.3 µg/m³
  • O3: 0.010 ppm
  • NO2: 46.1 ppb
  • SO2: 1.3 ppb
  • CO: 0.64 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.